Acquisitions - Mid Pac Acquisition (Detail) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended								12 Months Ended
	Apr. 01, 2015	Sep. 30, 2015	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Long-term debt			$ 384,812				$ 370,396				$ 384,812	$ 370,396
Goodwill			107,187				105,732				107,187	105,732	$ 41,327
Acquisition related costs											395	5,294	2,006
Revenues											2,443,066	1,865,045	2,066,337
Net income (loss)			$ 19,005	$ 18,824	$ 7,006	$ 27,786	$ 13,687	$ (27,761)	$ (13,088)	$ (18,673)	$ 72,621	$ (45,835)	(39,911)
Mid Pac Petroleum, LLC
Business Acquisition [Line Items]
Cash consideration	$ 74,400
Working capital settlement amount		$ 1,000
Advanced deposit	15,000													$ 10,000
Goodwill	26,942
Acquisition related costs													800
Revenues													147,600
Net income (loss)													$ 10,600
Mid Pac Petroleum, LLC | Mid Pac Petroleum, LLC
Business Acquisition [Line Items]
Long-term debt	45,300
Mid Pac Credit Agreement | Mid Pac Petroleum, LLC
Business Acquisition [Line Items]
Long-term debt	$ 55,000
Par Hawaii Inc. | Mid Pac Petroleum, LLC
Business Acquisition [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest	100.00%
Refining
Business Acquisition [Line Items]
Goodwill	$ 13,500
Retail
Business Acquisition [Line Items]
Goodwill	2,700
Logistics
Business Acquisition [Line Items]
Goodwill	$ 10,800